Dunwoody doesn't have one. Perimeter does, because Perimeter has footprints in three cities and developers and profiteers need an umbrella organization to coordinate efforts across all three. Dunwoody doesn't have a Chamber of Commerce because our tax dollars (residents, because developers don't pay taxes) are covering the paychecks of city bureaucrats who do everything a chamber would do. Everything a chamber should do. And more.
Don't believe it?
Look here. That's right, a city bureaucrat picked up an award for resident-funded CoC activities. And city bureaucrats are so proud they've issued a press release on receiving an award for going above and beyond doing CoC PR. A press release on how well they do press releases.
This is an outstanding example of a city bureaucracy that should be shut down and anyone surplus to needs should be made available to the greater PR community. Perhaps even a re-constituted Dunwoody Chamber of Commerce. Think the dwarfs can or would make that happen?